Attachment for scales.



A. N. PETTY.

ATTACHMENT FOR SCALES.

APPLICATION HLED APB.9,1912A Patented July 8, 1913.

2 SHEETSSHEET l,

a u ue 11km ./Z. 7i. 20e f A. N. PETTY.

ATTACHMENT POR SCALES.

APPLICATION FILED APB. e. 1912A Patented July 8, 1913.

2 SHEETS-SHEET 2.

citizen of the UnitedStates, resid-i secured thereto.

FEED STATES. PATENT QEFICE.

AMNER N. Pntr'nY; ou calcareo, 21m-.mors nssmfnonf 0F ONE-HALF To Rossana-N, 01" CHICAGO, xLL'INoIs.

HENRY@ meedelen fspecmum at Lemremum.

iraient-.ea 611151831913.

To'alnihnmizf may concern.'

Be it. 'known that I, Aimee `N. Br;' i'r,

"atChicago,.in the county ot Coollrlnndntte of Illinois, have inventedcertain new and useful Impr(rement-S in Attachments `fo'r Scales, of which the 'followingis a specication,

This invention relatesto weighing scales andhas for-its object the provision of afsirnple and accurate attachment whereby the weight of the article' on the scales will be automatically indicated, and the use of a Scale beam rendered unnecessary. Y A secondary object of the invention is to provide afconst-ruet-ion whereby the=device may be easilyfadjusted to insure accuracy in theresults indicated,.and inwhich the,parts will befew and arranged inn simple'manner so that repairsiwill befacilitated.Y l

The invention isillust-rated in the accompanying drawingsand will 'be hereinafter fully described, lthe novel -eatures being subsequently pointed out in 't-hec'lnim following thedescription. Y

In the drawings:-l"igure 1 is au elevation of my improved attachment; Fig. 2 is an end elevation. Fig. 3 isa `front elevation of a modified form of the attachment;

Fig. 4 is an enlarged detail view o''the "ac' tuating rack-bar `and pinion.

..ln carrying outmy invention, I secureto thereof, the forward ends of said posts being 'connected by a brace 4, and adial 5 being An arbor (i is journaled in the said bracket and the front brace and projects through the brace and the dial at the center of the dial and carries a pointer 7 on its`front end which is adapted to play around the dial in the-operation of the device. A pinion 8 is.lixed upon the'arofor 6 and-is enga-ged4 by a rack bar 9 pivotedto a pendulum or lever lO'which, in the preferred form. of the invention, is ulcrumed uponl a post ll projecting from the fixed support l, as clearly shown. The lower portion of this endulum or levenis threaded, as indicated) at 12, and a weight 13 is mounted upon said lower threaded extremity so that. it may be adjusted longitudinally of the same and thereby uSlue accuracy in the operation o'f the apparatus. The' rack bari) pivotally attachedrat one end .tothe lever`or=pendulum 10`below the fulcrun'i'of the same, as shown at 14, and a spring-.15 is secured to the lever orpendulum and bears upon the end o'f'the rack bar to hold 'the same in mesh with the pinion, as' will be readily understood. At the same time, the rack bar may belfted 'out of meshjwith the inion wheneverit is necessary to -repnir or clean thefparts of'theapparatus. The..pen dulum or lever is extended abov'elits ftill crum post '1'1- andfhas its upper. extended end rigidly secured to a cam or curved bar 16 .Y w ih extends outwardly and downwdly and has itsflowerend v.braced by a strut v1.7, y extendin vtherefromtot-he'upper end ofthe lever, l

be `partly supported by fthe leaidfpost sindl thereby maintained lin v, proper.\ operative :,plo-v sition, and the leveriis seguredto-.thefsaid 8() arm `18by bolts or similafaSIingdviCes 20. Upon the outer eonvexffaceof'thecam bar-16, adjaeentfthe end-ofthe-pendulumlle- I v ver, 'I secure one end of a stlrapor'band 211:5; l

vwhich "extends to theop osite .end of the 85'.

`lar wherelt 'is iidly secured "toa'n 1 'adjiisting bolt 22 which extends through the vend of the bar and is equipped fwith a' Washer 23 and a nut 24, whereby it may bev 1 secured firmly in place. ries of set-screws 25 extend through the cam bar and bear against the'inner ac of this strap or band 21 whereby to adjust the curvature of the same to secure the necessary tension on the` strapQG which is secured to 95 the upper end of the-cem bar and extends over the. band 21 in `cont-aclaila-herewith and then is carried downwardly' and equipped" with a hook 27 adapted tobe cohnected with one end of a lever 28 forming a part o'f the 100 scale mechanism. This lever, 28 is illus-A trated in Fig. 1 as equipped with a poise 29 so that. the said lever may be utilized as n Y tare beam when it is desired to obtain'theJ .n Y net weight of a lord upon a truck or 0pt-her 105 vehicle.

i lt is thought the operation of the dev1ce will be readily understood. The article to be weighed is placed upon the scale pletform in the usual manner and will at once 11d he cam bar may'be'secureddirect-lyy -to the lever,`but ispreferbly provided :with

A longitudinal se- .Y I

transmit motion through the link 30 to the"l lever A28, so as to draw downwardly'up'on i the strap 26 conncted therewith, and Vthe pull exerted upon said strap will be transmitted-tothe end of the cam bar 16 and the pendulum leve-r` 10, so that thegsaid bar and lever will swing about the fulcrum post l1 and thereby. carry-the 'looted' end of the rack bar 9 away from t e arbor 6, so as to rotate the pinion fon said arbor and thereby actuate the said shaft and cause the pointer 7 totrnvelaround the'dial and stop in front of the numeral expressive of the Weight on the scale. As soon as the article. Abeing f weighed is removed from the scale, the

weight 13 will return the parts to the initial normal position and bring the pointer back to zero.

In Fig. 3, I have shown a sliv ht modification of the invention in which t e pendulum lever 31 is fulcrumed lat its upper extremity upon a post 32, and the cam bar 33 extends laterally from the. lever at a point below the fulcrum and 1s curved upwardly, its

is carried through'a projection 36 at the end.

of the cam bar and secured by nuts 37 bearingagainst the said projection. The strap 38 extending tothe scale lever 39 passes upwardly over the cam bar, and the said lever is disposed above thesame, as shown. This form of the .invention will operate in the same manner 4as the previously described form, but is better adapted to some situations and some types of scales.

It will b'e understood thatthe attachment will be made in various sizes so that it may be readily applied to a scale of any size, and will expedite Weighing as it Will not be necessary to adjust va oise along a scale beam in order to ascertaln the weight placed upon the scale. By means of the set-screws and the weight 13, the devlce' can be readily adjusted so as to insure extreme accuracy and in practice it has been found to be very sensitive. The apparatus is composed of few parts which are simple in their construction and arrangement, s o that it can be easily cleaned orl repaired whenever such attention is necessary.

Having thus described my invention, what I claim as new, is

-An attachment for weighing-scales, comprising a pivoted indicator, a pinion on the pivot of the indicator, a pendulum arranged near and at one side of the pivot, a rack bar secured at one end to the pendulum and extending laterally therefrom over and meshing with the pinlon, a cam extendinv laterali from the pendulum above the rac bar an having one end rigid with-.the pendulum and braced between 'the pendulum and the opposite end of the cam, and a- Strap secured to and extending from the cam and connected with an actuatin device.

In testimony whereof I a x my signature in presence of two witnesses.

AMNER N. PETTY. [14.5.] 

